CN103672852A - Boiler feed pump cavitation prevention device - Google Patents
Boiler feed pump cavitation prevention device Download PDFInfo
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- CN103672852A CN103672852A CN201310705880.8A CN201310705880A CN103672852A CN 103672852 A CN103672852 A CN 103672852A CN 201310705880 A CN201310705880 A CN 201310705880A CN 103672852 A CN103672852 A CN 103672852A
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- feed pump
- heat exchanger
- oxygen
- eliminating device
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Abstract
The invention discloses a boiler feed pump cavitation prevention device which comprises a deaerator, a booster pump, a feed pump, a high pressure heater, a coal economizer and a double-pipe heat exchanger. The deaerator, the booster pump, the feed pump, the high pressure heater and the coal economizer are communicated in sequence through a pipeline. The deaerator is provided with a water inlet which is communicated with a condensed water inlet pipe. The double-pipe heat exchanger comprises an inner pipe and an outer pipe, wherein the inner pipe is communicated with the part, between the deaerator and the booster pump, of the pipeline. The condensed water inlet pipe, the outer pipe of the heat exchanger and the water inlet of the deaerator are communicated in sequence. According to the boiler feed pump cavitation prevention device, the cavitation prevention effect of the feed pump is good, heat recycling can be realized, the device is simple, and civil engineering cost is reduced.
Description
Technical field
The present invention relates to feed water system of boiler field, particularly relate to a kind of boiler feed pump anti cavitation device.
Background technology
The major function of power station water supply system is that the main condensate in deaerator storage tank is improved to pressure by feed pump, after further heating, is transported to the economizer entrance of boiler, as the feedwater of boiler through high-pressure heater.
Because feed pump pumped (conveying) medium is saturation water, feed pump lift is large, cavitation allowance is had relatively high expectations, therefore cavitation easily occurs feed pump.
In prior art, the method that solves boiler feed pump cavitation mainly contains: improve entrance of water-supplying pump pressure (improve oxygen-eliminating device setting height(from bottom), set up pre feedwater pump), reduce entrance of water-supplying pump coolant-temperature gage etc.
Large-scale power station water supply system is to prevent feed pump cavitation by configuration pre feedwater pump and the setting height(from bottom) that improves oxygen-eliminating device mostly at present.It is rear definite that the setting height(from bottom) of oxygen-eliminating device need be carried out transient state calculating to oxygen-eliminating device, because oxygen-eliminating device transient state is calculated the transient state situation that needs the various operating modes of consideration, considers after various allowances, and the installed height mark of oxygen-eliminating device is often high than normal operation desired height.And deaerator device excessive height not only causes many difficulties of installing, simultaneously also uneconomical.
The necessary condition that produces cavitation is that in pump, local pressure reaches or lower than the pressure for vaporization of liquid.Judge that whether the medium in pump vaporizes, and need, in conjunction with the anti-cavitation performance of pump itself, measure the temperature of entrance of water-supplying pump, pressure parameter.If vaporize, by the temperature of timely reduction medium, make medium temperature lower than saturation temperature corresponding to this pressure, can effectively suppress to pump into the vaporization of saliva, thereby reach the object that prevents mercury vapour erosion.
Summary of the invention
Based on this, be necessary to provide a kind of anti-feed pump cavitation effective, can realize heat recovery and utilization, equipment is simple and civil engineering costs is saved boiler feed pump anti cavitation device.
A kind of boiler feed pump anti cavitation device, comprise oxygen-eliminating device, fore pump, feed pump, high-pressure heater, economizer and double pipe heat exchanger, described oxygen-eliminating device, fore pump, feed pump, high-pressure heater and economizer are communicated with successively by pipeline, described oxygen-eliminating device has water inlet, and the water inlet of described oxygen-eliminating device is communicated in condensate water oral siphon;
Described double pipe heat exchanger has inner tube and outer tube, and described inner tube is communicated in the pipeline between described oxygen-eliminating device and described fore pump, and described condensate water oral siphon, the outer tube of heat exchanger and the water inlet of oxygen-eliminating device are communicated with successively.
In an embodiment, oxygen-eliminating device is communicated with the inner tube of described fore pump by double pipe heat exchanger therein.
In an embodiment, the outer tube of described double pipe heat exchanger is communicated in described condensate water oral siphon therein, makes described condensate water oral siphon be communicated in the water inlet of described oxygen-eliminating device and the outer tube of described double pipe heat exchanger simultaneously.
In an embodiment, the condensate water oral siphon between the outer tube of described double pipe heat exchanger and the water inlet of described oxygen-eliminating device is also communicated with low-pressure heater therein.
In an embodiment, the water inlet of described oxygen-eliminating device is provided with restricting orifice therein.
In an embodiment, two mouth of pipe places of the outer tube of described double pipe heat exchanger are equipped with control valve therein.
Therein in an embodiment, between the delivery port of described oxygen-eliminating device and described fore pump, be equipped with control valve between described feed pump and described high-pressure heater.
In an embodiment, between described high-pressure heater and described economizer, be provided with flow controller therein.
Above-mentioned boiler feed pump anti cavitation device, by by double pipe heat exchanger to the pipeline heat exchange between described oxygen-eliminating device and fore pump, make to flow out the temperature reduction that oxygen-eliminating device enters the water of fore pump and feed pump, make the anti-cavitation of feed pump effective, by the heat in oxygen-eliminating device, the casing recovery by double pipe heat exchanger utilizes in the present invention, realized recycling of heat, economized on resources; And the equipment the present invention relates to is simple, civil engineering costs is saved.
Above-mentioned boiler feed pump anti cavitation device, oxygen-eliminating device is communicated with the inner tube of described fore pump by double pipe heat exchanger, does not affect feedwater quality, and is conducive to reduce the resistance of low pressure feed water pipeline.
Above-mentioned boiler feed pump anti cavitation device, the outer tube of described double pipe heat exchanger is communicated in described condensate water oral siphon, make described condensate water oral siphon be communicated in the water inlet of described oxygen-eliminating device and the outer tube of described double pipe heat exchanger simultaneously, make condensate water after double pipe heat exchanger heat exchange again by entering oxygen-eliminating device after the circulation of condensate water oral siphon, form circulating process.
Above-mentioned boiler feed pump anti cavitation device, the condensate water oral siphon between the outer tube of described double pipe heat exchanger and the water inlet of described oxygen-eliminating device is also communicated with low-pressure heater, for realizing backheat circulation.
Above-mentioned boiler feed pump anti cavitation device, is provided with restricting orifice between the water inlet of described oxygen-eliminating device, and the pressure of water and the pressure of oxygen-eliminating device that enter oxygen-eliminating device are mated.
Above-mentioned boiler feed pump anti cavitation device, two mouth of pipe places of the outer tube of described double pipe heat exchanger are equipped with control valve, between the delivery port of described oxygen-eliminating device and described fore pump, be equipped with control valve between described feed pump and described high-pressure heater, control valve plays the effect of switch, is convenient to control the circulation of condensate water or close.
Above-mentioned boiler feed pump anti cavitation device, is provided with flow controller between described high-pressure heater and described economizer, is convenient to control enter the discharge in economizer.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention schematic diagram;
Fig. 2 is the schematic diagram that the outlet of embodiment of the present invention double pipe heat exchanger is communicated in condensate water oral siphon;
Fig. 3 is the schematic diagram that the embodiment of the present invention has low-pressure heater.
Description of reference numerals
10, oxygen-eliminating device; 12, oxygen-eliminating device water inlet; 20, double pipe heat exchanger; 22, double pipe heat exchanger inner tube; 24, double pipe heat exchanger outer tube; 30, fore pump; 40, feed pump; 50, high-pressure heater; 60, economizer; 70, restricting orifice; 80, low-pressure heater; 90, flow controller; 100, control valve; 110, condensate water oral siphon.
The specific embodiment
Below with reference to embodiment and accompanying drawing, the present invention is described further.
A kind of boiler feed pump anti cavitation device, referring to Fig. 1, comprise oxygen-eliminating device 10, fore pump 30, feed pump 40, high-pressure heater 50, economizer 60 and double pipe heat exchanger 20, described oxygen-eliminating device 10, fore pump 30, feed pump 40, high-pressure heater 50, economizer 60 passes through pipeline communication successively, described oxygen-eliminating device 10 also has oxygen-eliminating device water inlet 12, described double pipe heat exchanger 20 has double pipe heat exchanger inner tube 22, double pipe heat exchanger outer tube 24, described oxygen-eliminating device water inlet 12 is provided with control valve 100, described double pipe heat exchanger inner tube 22 is communicated in the pipeline between described oxygen-eliminating device 10 and fore pump 30, or do not establish pipeline between described oxygen-eliminating device 10 and fore pump 30, described oxygen-eliminating device 10 is directly communicated with by described double pipe heat exchanger inner tube 22 with fore pump 30,
One end of described double pipe heat exchanger outer tube 24 is communicated in described condensate water oral siphon 110, the other end is communicated in oxygen-eliminating device water inlet 12, or, referring to Fig. 2, the other end of described double pipe heat exchanger outer tube 24 is also communicated in described condensate water oral siphon 110, the condensate water oral siphon 110 of this end is further communicated in described oxygen-eliminating device water inlet 12, make described condensate water oral siphon 110 be communicated in described oxygen-eliminating device water inlet 12 and double pipe heat exchanger outer tube 24 simultaneously, or, referring to Fig. 3, the other end of described double pipe heat exchanger outer tube 24 is also communicated in described condensate water oral siphon 110, the condensate water oral siphon 110 of this end is further communicated in described oxygen-eliminating device water inlet 12, make the described condensate water oral siphon 110 of this end be communicated in described oxygen-eliminating device water inlet 12 and double pipe heat exchanger outer tube 24 simultaneously, and be communicated with low-pressure heater 80 between the condensate water oral siphon 110 of this end and described oxygen-eliminating device water inlet 12,
Two mouth of pipe places of described double pipe heat exchanger outer tube 24 are equipped with control valve 100, described oxygen-eliminating device water inlet 12 is provided with restricting orifice 70, between described oxygen-eliminating device and described fore pump 30, be equipped with control valve 100 between described feed pump 40 and described high-pressure heater 50, between described high-pressure heater 50 and described economizer 60, be provided with flow controller 90.
The present invention in use, first all opens control valve 100, and the saturation water in oxygen-eliminating device 10 passes through double pipe heat exchanger inner tube 22, fore pump 30, feed pump 40 and high-pressure heater 50 successively, then enters in economizer 60.In addition, low-temperature condensate enters oxygen-eliminating device 10 after entering double pipe heat exchanger outer tube 24, heat exchange intensification by condensate water oral siphon 110.Wherein, the double pipe heat exchanger inner tube 22 of flowing through for low pressure feed water, what flow through double pipe heat exchanger outer tube 24 is condensate water, by the pipeline between 20 pairs of oxygen-eliminating devices 10 of double pipe heat exchanger and fore pump 30, carry out heat exchange cooling, thereby reduce the temperature that enters condensate water in feed pump 30, prevent the cavitation of feed pump 30.
The boiler feed pump anti cavitation device the present invention relates to, by be also connected with double pipe heat exchanger between described oxygen-eliminating device and fore pump, and double pipe heat exchanger inside has sleeve pipe, make to flow out the temperature reduction that oxygen-eliminating device enters the water of fore pump and feed pump, make the anti-cavitation of feed pump effective, by the heat in oxygen-eliminating device, the casing recovery by double pipe heat exchanger utilizes in the present invention, has realized recycling of heat, economizes on resources; And the equipment the present invention relates to is simple, civil engineering costs is saved.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a boiler feed pump anti cavitation device, it is characterized in that, comprise oxygen-eliminating device, fore pump, feed pump, high-pressure heater, economizer and double pipe heat exchanger, described oxygen-eliminating device, fore pump, feed pump, high-pressure heater and economizer are communicated with successively by pipeline, described oxygen-eliminating device has water inlet, and the water inlet of described oxygen-eliminating device is communicated in condensate water oral siphon;
Described double pipe heat exchanger has inner tube and outer tube, and described inner tube is communicated in the pipeline between described oxygen-eliminating device and described fore pump, and described condensate water oral siphon, the outer tube of heat exchanger and the water inlet of oxygen-eliminating device are communicated with successively.
2. boiler feed pump anti cavitation device according to claim 1, is characterized in that, oxygen-eliminating device is communicated with the inner tube of described fore pump by double pipe heat exchanger.
3. boiler feed pump anti cavitation device according to claim 1 and 2, it is characterized in that, the outer tube of described double pipe heat exchanger is communicated in described condensate water oral siphon, makes described condensate water oral siphon be communicated in the water inlet of described oxygen-eliminating device and the outer tube of described double pipe heat exchanger simultaneously.
4. boiler feed pump anti cavitation device according to claim 3, is characterized in that, the condensate water oral siphon between the outer tube of described double pipe heat exchanger and the water inlet of described oxygen-eliminating device is also communicated with low-pressure heater.
5. boiler feed pump anti cavitation device according to claim 1 and 2, is characterized in that, the water inlet of described oxygen-eliminating device is provided with restricting orifice.
6. boiler feed pump anti cavitation device according to claim 1 and 2, is characterized in that, two mouth of pipe places of the outer tube of described double pipe heat exchanger are equipped with control valve.
7. boiler feed pump anti cavitation device according to claim 1 and 2, is characterized in that, between the delivery port of described oxygen-eliminating device and described fore pump, be equipped with control valve between described feed pump and described high-pressure heater.
8. boiler feed pump anti cavitation device according to claim 1 and 2, is characterized in that, between described high-pressure heater and described economizer, is provided with flow controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310705880.8A CN103672852A (en) | 2013-12-18 | 2013-12-18 | Boiler feed pump cavitation prevention device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310705880.8A CN103672852A (en) | 2013-12-18 | 2013-12-18 | Boiler feed pump cavitation prevention device |
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| CN103672852A true CN103672852A (en) | 2014-03-26 |
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| CN201310705880.8A Pending CN103672852A (en) | 2013-12-18 | 2013-12-18 | Boiler feed pump cavitation prevention device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500573A (en) * | 2019-09-23 | 2019-11-26 | 云南锡业股份有限公司铜业分公司 | A kind of system and method preventing electrode steam boiler water supply pump cavitation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11294711A (en) * | 1998-04-14 | 1999-10-29 | Nippon Steel Corp | Device and method for preventing cavitation of pump |
| CN201199025Y (en) * | 2008-03-07 | 2009-02-25 | 陕西雷光环保科技有限公司 | Automatic recovering device of condensed water |
| CN202040802U (en) * | 2011-02-23 | 2011-11-16 | 威海市锅炉制造厂 | Re-cold low level heating power deaerator |
| CN102312244A (en) * | 2011-09-26 | 2012-01-11 | 张啸 | Thermal equipment operation cleaning agent and its application |
| CN203671581U (en) * | 2013-12-18 | 2014-06-25 | 中国能源建设集团广东省电力设计研究院 | Cavitation prevention device of boiler feed pump |
-
2013
- 2013-12-18 CN CN201310705880.8A patent/CN103672852A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11294711A (en) * | 1998-04-14 | 1999-10-29 | Nippon Steel Corp | Device and method for preventing cavitation of pump |
| CN201199025Y (en) * | 2008-03-07 | 2009-02-25 | 陕西雷光环保科技有限公司 | Automatic recovering device of condensed water |
| CN202040802U (en) * | 2011-02-23 | 2011-11-16 | 威海市锅炉制造厂 | Re-cold low level heating power deaerator |
| CN102312244A (en) * | 2011-09-26 | 2012-01-11 | 张啸 | Thermal equipment operation cleaning agent and its application |
| CN203671581U (en) * | 2013-12-18 | 2014-06-25 | 中国能源建设集团广东省电力设计研究院 | Cavitation prevention device of boiler feed pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500573A (en) * | 2019-09-23 | 2019-11-26 | 云南锡业股份有限公司铜业分公司 | A kind of system and method preventing electrode steam boiler water supply pump cavitation |
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Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Applicant after: Company limited of China Energy Engineering Group Guangdong Electric Power Design Institute Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Applicant before: Guangdong Electric Power Design Institute of CEEC |
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Free format text: CORRECT: APPLICANT; FROM: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE TO: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE CO., LTD. |
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Application publication date: 20140326 |